Magnetic separator.



Patented July 15, 1913.

G. ULLRIOH.

MAGNETIC SEPARATOB. APPLICATION FILED JAN.12,1912.

- armatl.n'e and counter GEORG ULLRICH, OF MAGDEBURG, GERMANY.

, MAGNETIC SEPARA'I'OR.

Specification of Letters Patent.

Patented July 1 5, 1! EM 3..

' Application filed January 12 1912. Serial No. 670,938.

.the following is a specification.

This invention relates to magneticseparators having a number of magneticfields i. 6. operating points arranged in a circle around a verticalaxis or shaft.

The present invention consists in the combination. with a magneticseparator having two fixed magnets, that is to say two fixed poles, inthe magnetic field of each operating place, of a nonmagnetizablerevoluble carrying member, which protects or shields the magnet polesand the field gaps of each magnetic field from the material undertreatment. liy this combination the result attained is that both polesof each magnetic field simultaneously furnish positive work.

Constrmrtional forms of the invention are illustrated in verticalsection in l igures l, 2 and 3 0f the accompanying drawing.

Seve 'al magnets b provided with a common core a and energized by a coil(2 are fixed around a vertical shaft and above the magnets Z) amagnetizable annular body (Z is arranged, which serves as a eonnnon poleforthe. magnets A non-magnetizablc annular revoluble carrying member 0surroumls the magnet. poles b and (l in such a manner that. the latterand the field gaps of the several mag netic fields are protected orshielded from the material under treatment. The revoluble carryingmember in the construction illustrated in Fig. 1 is connected by arms 5with a hub It which-is keyed to a shaft Z. The shaft 7: can be rotatedby means of any convenient gear not shown in the drawing.

In the construction illustrated in Fig. 2 the carrying member cis-comiected with an annular plate or ring m. which is keyed orotherwise secured to the shaft 7: to rotate with the same.

The construction in Fig. 3 shows directly above each other superposedpoles, while that illustrated in Fig. 2 shows the poles arrangedobliquely one above the other similarly'to Fig. 1.

-As shown in the drawing, the position of the supply channels 7 can beselected in such a manner that the path of the material be treatedintersects the path of the separated material in any direction or thatboth paths run parallel in the same or in opposite directions.

The operation of the apparatus is as follows: The material to be treatedis conducted by any convenient apparatus onto the inclined supply tablesf by which it is conveyed to the several magnetic fields at the lowerend oi each supply table f. The magnetic material is thensilmiltaneo'usly attracted by both poles (magnet pole [2 and counterpole (Z) oil each magnetic field. The non n'iagnctic material falls intoa suitable receptacle at the lower end of each supply table while themagnetic material collects on the carrying member a which protects thepoles 7) and (Z from the supply of material: the material then carriedout of the sev eral magnetic fields and it falls in the space betweentwo adjacent magnetic fields. In order to prevent the magnetic materialfrom being carried to the next magnetic field when the carrying memberrotates rapidly, the magmrtizable matter may be washed, scraped orbrushed away from the carrying member.

The tollmving advantages are obtained by the invention: Thenon-magnetimble carrying member rotating about a vertical shat'trequires but little. n'ieclnlnical force for driving it and further,material in pieces of ditl erent sizes can be treated simultaneously ina number o'l magnetic fields, posi tive work being furnishedsimultaneously by both poles of each magnetic field. A furtheradvantage. of the scymrator of this application, lies in the tart. that.the field gap can be modified by raising or lowen-ing the upper magnet.and the strength of the held can thus i rcgulatt-sd without changing thestrength of the current. The poles might thus be set very closelytogether.

The apparatus is not confined to the examples described above andillustrated in the accompanying drawing: on the contrary there are alarge number of possible constructional modifications both of the apparatus as a whole and also of its several parts.

The arrangement of the mounting and guidance and also the term of thecarrying member can be modified as desired; it is however essential thatthe carrying member should protect or shield the magnet poles and the.field gaps of the magnetic fields from the material under treatment.

Having thus described my invention, What I claimas new therein anddesire to secure by Letters Patent is:

1. In a magnetic separating device, a plurality of magnetic poles forproducing a series of magnetic fields, symmetrically arranged in ahorizontal plane around and equidistant from a common axis, a rotatingannular carr 'in member intersectin said fields, against which themagnetic material is held by said magnetic poles and which 15 free fromobstruction to downward dis charge of material; means for feedingmaterial llllO contact with said carrier Within each field and astationary elenicnthaving an unbroken lovver edge and constituting acounter pole for the series of magnetic poles also adapted to attractmaterial'to said cai-- rier; said device and the carrier being adaptedto discharge the attracted material intermediate each field.

2. In a magnetic separating device, a plurality of magnetic poles forproducing a se ries of magnetic fields, syu'nnetrically arranged in ahorizontal plane around and equi-distant from a common axis, a rotatingannular carrying member intersecting said fields against which themagnetic material is held by said magnetic poles and which is free fromobstruction to downward discharge of material; means for feedingmaterial into contact with said carrier within each field and astationary element having an unbroken lower edge and constituting acounter-pole for the series of magnetic poles also adapted to attractmaterial to said carrier; said device and the carrier being adapted todischarge the attracted material intermediate each field; said annularcarry ing member overlapping said magnetic poles and said counter-poles.

3. in a magnetic separating device means i for producing a plurality ofmagnetic fields symmetrically arranged in horizontal plane equi-distantfrom a common axis, each of said fields comprising a stationary lowerpoleand a stationary upper pole with an unbroken 1mm edge and common toall the fields and situated directly above said lower poles, and anannular rarrying member situated outside of said poles and means to teedmaterial to be separated into each magnetic field outside the carrier.

4. In a magnetic separating device means meme for producing a pluralityof magnetic fields;

symmetrically arranged in a horizontal plane equi-distant from a commonaxis, each of said fields comprising a stationary lower pole and astationary upper poleiwith an unbroken lower edge and common to all thefields and situated directly above said lower poles, and an annularcarrying member sitpoles; a rotating annular carrying member againstwhich the matter to be separated is attracted by the poles in adirection toward the common axis; said carrying member being situatedadjacent to and outside'of said poles and adapted to entirely cover thefield gap and means to feed material to be sepa-' rated into eachmagnetic field outside the carrier.

(3. in a magnetic separating device means for producing a plurality ofmagnetic fields symmetrically arranged in a horizontal planeequi-distant from a common axis, each of said fields comprising astationary lower pole and a stationary upper pole with an unbroken loweredge and common to all the fields and situated directly above said lowerpoles; a rotating annular" carrying member against which the matter tobe separate; is at racted by the poles in a direction toward the commonarns; said carrying member being situated adjacent to and outside ofsaid poles and adapted to entirely cover the field gap; said carryingmember being non-magnetic and means to feed material to be separatedinto each magnetic field outside the carrier.

'lhe foregoing specification signed at Magdeburg, this 21st day ofDecember, 1911.

GEORG ULLRICH. ln presence of- VJuummi FLEISCHHACK, ()simn li'luuuson.

